This year’s expected Apple Watch updates are all about the sensors

That said, Bloomberg notes that, design-wise, this year’s Apple Watches will look the same as last year’s models. That means the Series 9 will stick with the 41mm and 45mm cases, while the Ultra will remain at 49mm. The main difference will be a shift toward 3D-printed cases for stainless steel Series 9 models as part of an eco-friendly push.